Abstract
We continue our study of contact structures on manifolds of dimension at least five
using surgery-theoretic methods. Particular applications include the existence of
“maximal” almost contact manifolds with respect to the Stein cobordism relation as
well as the existence of weakly fillable contact structures on the product M S
2
.
We also study the connection between Stein fillability and connected sums: we give
examples of almost contact manifolds for which the connected sum is Stein fillable,
while the components are not.
Concerning obstructions to Stein fillability, we show for all k > 1 that there are
almost contact structures on the .8k1/–sphere
which are not Stein fillable. This
implies the same result for all highly connected .8k1/–manifolds
which admit
almost contact structures. The proofs rely on a new number-theoretic result about
Bernoulli numbers.
32E10; 57R17, 57R65
Original language | English |
---|---|
Pages (from-to) | 2995-3030 |
Number of pages | 36 |
Journal | Geometry & Topology |
Volume | 19 |
Issue number | 5 |
Early online date | 20 Oct 2015 |
DOIs | |
Publication status | Published - 20 Oct 2015 |
Keywords
- Stein fillability
- surgery
- contact structures
- bordism theory